ECS is seeking a Senior Software Engineer to work in our St. Louis, MO office.
ECS is seeking an energetic person to Join ECS Federal's elite engineering team supporting one of National Security’s most critical modernization initiative. As a Senior Software Engineer, you'll architect solutions that directly enable warfighters, intelligence professionals, and first responders to make split-second decisions with world-class GEOINT data.
* Requires final acceptance by the Prime contractor and government customer.
** Validation of required clearances upon acceptance and approval from a cognizant government contracting officer. After customer indoctrination, the candidate will be submitted for a Counterintelligence Polygraph.
This isn't just another federal contract—it's your opportunity to lead transformation efforts that impact global operations daily. You'll work inside a cutting-edge facility, collaborating directly with government technical leads and intelligence analysts to solve problems that don't have textbook answers.
Value Proposition
- Immediate Impact: Your solutions go into production, supporting real-world intelligence operations—not trapped in endless development cycles.
- Technical Freedom: Contribute the architectural direction. We trust our talent to identify the right tools, frameworks, and approaches without bureaucratic constraints.
- Innovation Culture: We invest in emerging technologies—AI/ML, automation, advanced analytics—and empower our team to implement them where they add mission value.
- Elite Collaboration: Work alongside some of the most talented developers, engineers, and scientists in the community.As a Senior Software Engineer, you'll serve as a technical expert and trusted advisor, bridging the gap between complex requirements and impactful technical solutions that will be employed against our nations most critical threats
Core Responsibilities
- Architect full-stack geospatial intelligence solutions processing petabytes of data across classified networks, designing APIs and microservices that integrate real-time collection feeds with analytic platforms for sub-second intelligence delivery
- Champion DevSecOps transformation by implementing CI/CD pipelines achieving 99.7% deployment success rates using GitLab, Jenkins, container orchestration, and automated security scanning
- Collaborate directly with GEOINT analysts to translate operational mission workflows into technical requirements and present capability demos to customer leadership during quarterly reviews
- Drive technical decisions across the stack leveraging Java/Python/JavaScript frameworks, AWS GovCloud infrastructure, geospatial technologies (OGC services, PostGIS), and data engineering platforms (Kafka, PostgreSQL, Elasticsearch)
- US Citizen.
- Active TS/SCI security clearance required to apply; must be able to pass a CounterIntelligence (CI) polygraph following customer indoctrination.
- MS in Computer Science/Engineering + 8 years of software engineering experience; OR BS + 10 years; OR 12 years without degree; or a combination of military (17+ years), experience, training or certifications.
- Demonstrated firsthand experience in at least three of the following:
- Java, JavaScript or Python enterprise application development, Web services architecture, design, and development
- Relational database design
- Spatial database design
- SQL database design
- Micro-service architecture, design and development
- Containerization and/or Orchestration
- API Development
- Minimum of 3 years or more experience with agile and lean philosophies, with at least 2 years serving as scrum or team lead
- Cloud Native Development, AWS, Azure, Google Cloud or similar Cloud Service providers
- Experience with Continuous Delivery and Continuous Integration (CI/CD) techniques, test-driven development, or automated testing practices
- Experience with relational database development
- Proven track record leading enterprise-scale development efforts with measurable mission impact
- Hands-on experience implementing CI/CD pipelines that meet strict security accreditation requirements (ATO, IAVA)
- Ability to mentor engineers and elevate team technical capabilities
- Success translating complex intelligence requirements into a variety software architectures
- Independent operator comfortable working in ambiguous, fast paced environments
- Work with clients or stakeholders to develop user-stories in support of full-service consumer and business applications
Top Skills
What We Do
ECS, a segment of ASGN (NYSE: ASGN), delivers advanced solutions and services in cloud, cybersecurity, artificial intelligence (AI), machine learning (ML), application and IT modernization, and science and engineering. The company solves critical, complex challenges for customers across the U.S. public sector, defense, intelligence and commercial industries.
ECS maintains partnerships with leading cloud, cybersecurity, and AI/ML providers and holds specialized certifications in their technologies.
Headquartered in Fairfax, Virginia, ECS has more than 3,400 employees throughout the U.S. and has been recognized as a Top Workplace by The Washington Post for the last five years.
